Kenran Butou Sai: The Mars Daybreak

Oceans cover Mars, where many inhabitants struggle under Earth's authority. Gram River is trying to make a living when a clash involving pirates and the military puts him aboard the Ship of Aurora and links him with an underwater combat machine.

The crew offers companionship and a kind of freedom he never expected to find among pirates. Yet his childhood friend serves with the forces pursuing them, bringing his past into direct conflict with his new life. Staying with the ship means choosing what loyalty and freedom are worth to him.